Defects detection in typical positions of bend pipes using low-frequency ultrasonic guided wave

Abstract

In order to analyze the possibility of detecting defects in bend pipe using low-frequency ultrasonic guided wave, the propagation of T(0,1) mode and L(0,2) mode through straight-curved-straight pipe sections was studied. FE (finite element) models of bend pipe without defects and those with defects were introduced to analyze energy distribution, mode transition and defect detection of ultrasonic guided wave. FE simulation results were validated by experiments of four different bend pipes with circumferential defects in different positions. It is shown that most energy of T(0,1) mode or L(0,2) mode focuses on extrados of bend but little passes through intrados of bend, and T(0,1) mode or L(0,2) mode is converted to other possible non-axisymmetric modes when propagating through the bend and the defect after bend respectively. Furthermore, L(0,2) mode is more sensitive to circumferential notch than T(0,1) mode. The results of this work are beneficial for practical testing of pipes.

Keywords

low-frequency ultrasonic guided wave / bend pipe / extrados of bend / intrados of bend / FE (finite element) simulation / experimental investigation

References

[1] ChenZ-g, LianX-j, HeL. Using acoustic technique to detect leakage in city gas pipelines [J]. Journal of Central South University, 2012, 19(6): 2373-2379

[2] CobbA C, KwunH, CaseresL, JanegaG. Torsional guided wave attenuation in piping from coating, temperature, and large-area corrosion [J]. NDT&E International, 2012, 47: 163-170

[3] WangW, DuanJ-m, LiM, XinP, ShiB-h, ZhangW-w, GongJ. A successful case of hydrocarbon dew point analysis during mixing of natural gases in transmission pipeline [J]. Journal of Central South University, 2013, 20(7): 2454-2458

[4] PredoiM V, PetreC C. Guided waves scattering by discontinuities near pipe bends [J]. Proceedings of Meetings on Acoustics, 2013, 19: 1-9

[5] MuJ, HuaJ, RoseJ L. Ultrasonic guided wave focus inspection potential of bare and coated pipes [J]. Review of Quantitative Nondestructive Evaluation, 2010, 29: 239-246

[6] SandersonR M, HutchinsD A, BillsonD R, MudgeP J. The investigation of guided wave propagation around a pipe bend using an analytical modeling approach [J]. J Acoust Soc Am, 2013, 133(3): 1404-1414

[7] HayashiT, KawashimaK, SunZ Q, RoseJ L. Guided wave propagation mechanics across a pipe elbow [J]. Journal of Pressure Vessel technology, 2005, 27: 322-327

[8] ZhouW J, IchchouM N. Wave propagation in mechanical waveguide with curved members using wave finite element solution [J]. Computer Methods in Applied Mechanics and Engineering, 2010, 199: 2099-2109

[9] SandersonR, CattonP P. An analytical model for guided wave array design for structures of any cross section [J]. IEEE Trans Ultrason Ferroelectr Freq Control, 2011, 58(5): 1016-1026

[10] RuddK E, LeonardK R, BinghamJ P, HindersM K. Simulation of guided waves in complex piping geometries using the elastodynamic finite integration technique [J]. Journal of the Acoustical Society of America, 2007, 121(3): 1449-1458

[11] WangY, HaoH, ZhuX-q, OuJ-p. Spectral element modelling of wave propagation with boundary and structural discontinuity reflections [J]. Advances in Structural Engineering, 2012, 15(5): 855-870

[12] SalleyL, PanJ. A study of the modal characteristics of curved pipes [J]. Applied Acoustics, 2002, 63: 189-202

[13] VermaB, MishraT K, BalasubramaniamK, RajagopalP. Interaction of low-frequency axisymmetric ultrasonic guided waves with bends in pipes of arbitrary bend angle and general bend radius [J]. Ultasonics, 2014, 54(3): 801-808

[14] DemmaA, CawleyP, LoweM, PavlakovicB. The effect of bends on the propagation of guided waves in pipes [J]. Journal of Pressure Vessel Technology, 2005, 127: 328-335

[15] FuruhashiS, SorimachiK, SugiuraT. Change in mode configurations and propagation velocity of guided waves through an elbow section of a pipe [J]. IEEE Int Ultrasonics Symp Proc, 2010, 10: 2211-2214

[16] SHINO H N, YOSHIDA K, CHO H, TAKEMOTO M.Propagation phenomena of wideband guided waves in a bended pipe [J]. Ultrasonics, 2006, 44: 1139–1143.

[17] RoseJ L, MuJ, ChoY. Recent advances on guided waves in pipe inspection [C]// 17th World Conference on Nondestructive Testing. Shanghai: CHSNDT, 2008290-295

[18] WangX-y, SunY-x, LiuZ-h, WuB, HeC-f, LiL-t. Application of second development based on Ansys software on simulation of detection defect in curved pipes using ultrasonic guided waves [J]. Nondestructive Testing, 2006, 28(8): 413-415

[19] NishinoH, MasudaS, MizobuchiY, AsanoT, YoshidaK. Long-range testing of welded elbow pipe using the T(0,1) mode ultrasonic guided wave [J]. Japanese Journal of Applied Physics, 2010, 49: 116601-116606

[20] ZhongF-p, YeY-f, ChengM, BaiM-z. Applicability of the guided wave ultrasonic testing for different types of pipeline corrosion [J]. Pressure Vessel Technology, 2009, 26(2): 11-15

[21] YingY J, HarleyJ, GarrettJ H, JinY W, MouraJ M F, O’DonoughueN, OppenheimI J, SoibelmanLTime reversal for damage detection in pipes [C], 2010, 7647: 76473

[22] LiJ, RoseJ L. Natural beam focusing of non-axisymmetric guided waves in large-diameter pipes [J]. Ultrasonics, 2006, 44: 35-45

[23] HouillonaL, IchchoubM N, JezequelL. Wave motion in thin-walled structures [J]. Journal of Sound and Vibration, 2005, 281: 483-507

[24] LuoW, RoseJ L. Phased array focusing with guided waves in a viscoelastic coated hollow cylinder [J]. J Acoust Soc Am, 2007, 121: 1945-1955

[25] LØVstadA, CawleyP. The reflection of the fundamental torsional mode from pit clusters in pipes [J]. NDT & E International, 2012, 46: 83-93